To use this package, install devtools and in your voivod directory, run devtools::install(). Then you can import it like any other library (library(voivod)).
Use VoI_log if your respondents only provided the triad P(U), P(U|C), P(C). Use VoI_log_updatable if your respondents provided P(U), P(U|C), P(U|~C), P(C). See notes in the documentation.